Tire-pump.



.JEssE T. EIEsE, oF FEEsNo, CALIFORNIA, Assrenon To LIsENBY MFG. co., oF FRESNO,

i CALIFORNIA.

TIRE-PUMP.

Specification of Letters Patent.

Patented Apr. ae, wie,

Application led April 2, 1918. Serial No. 226,238.

To all 'whom t may concern:

Be it known that I, JEssE T. FIEsE, citi- Zen of the United States, residing at Fresno, in the county of Fresno and State of California, have invented certain new and useful Improvements in Tire-Pumps, of which the following is a specification.

This invention relates to an improved pneumatic tire pump and has as its primary obj ect to provide a construction wherein the intake valve of the pump will be supported for axial movement directly upon the pump base at the lower end of the pump cylinder and will be free with respect to the said base while, at the same time, the said valve will be effectually held against accidental displacement. o

The invention has as a further object to provide an arrangementl whereinthe valve will be mounted within a suitable socket therefor and wherein the shank of the valve will be formed to coact with the walls of said socket for centering the valve with respect to its seat and rigidly guiding the valve `in its reciprocati movement.

A still further obj ect o the invention is to provide a construction wherein the valve will be spring pressed to closed position and wherein the spring employed will be free with respect to the valve so that the said spring may be renewed as occasion may demand.

4'The invention has'as a further object to provide an arrangement .wherein the valve will be protected and held against displacenient by a guard plate thereforadapted to prevent pounding of the pumpV Ypiston against the valve'.

And the invention has as a still further object to provide an arrangement wherein the spring normally holding thevalve seated will bear between the valve and the guard plate and wherein the guard plate may be readily displaced to permit of removal of the said spring and the valve. 1

Other and incidental objects will appear as the description proceeds, and in the draw-` ings wherein I have illustrated the preferred embodiment of the invention, and wherein similar reference characters designate corresponding .parts throughout the, several views: Y

Figure lis a side elevation of my improved pump partly broken away to show the mounting of the disks of the closure plug at the Vupper end of the pump cylinder as well as the construction of the base of the pump,

F ig.,2 is a fragmentary sectional view on an enlarged scale particularly showing the mounting of the intake valve and associated parts of the pump, l

Fig. 3 is a sectional view taken on the line 3 3 of Fig. 1 and showing the vent openings formed in the closure plug for the upper end of the pump cylinder,

Fig. L is a transverse sectional view taken on the line f-I of Fig. 1 and looking in the direction of the arrows, this view particu larly showing the openings formed in the guard plate for the intake valve of the pump so as to permit ow of air through the said plate,

Fig. 5 is a detail perspective view showing the 4intake valve detached, and

Fig. 6 is a fragmentary sectional view showing a slight modification of the invention.

In carrying out the. invention my improved pump is formed with a stirrup 10 having upwardly converging sides 11 at the upper ends of which is formed an annular pump base 12 integral with the sides` of the stirrup. Formed inthe pump base from the upper side thereof is an annular valve socket 13 disposed axially of the base and provided through its bottom wall with a plurality of intake opening 14 extending through the bottom face of the base. Formed in the base to surround the upper end of the socket 13 is anannular valve chamber 15 concentric to the .said socket and surrounding this chamber is an annular` ledge or shoulder 16 from the periphery of which the base is formed with an upstanding annular ange 17. A.Leading from the valve chamber l5 is a discharge passage 18 which extends through a lateral extension 19 formed upon the base at the adjacent side thereof. Threaded into this extension to communicate with the said passage is an upstanding headed nipple 20 over which any suitable discharge tube 21 may be fitted. At its inner end the nipple is formed with a valve seat 22 and freely mounted within the said nipple is a ball valve 23 adapted to cooperate with the said seat for checking back flow of air into the passage 18. This valve is retained within the nipple by a suitable lug 24- struck inwardly from the nipple at its outer end.

Formed at the upper end of the valve socket 13 is an annular beveled valve seat 25 and movably fitted within the socket to cooperate with the said seat is an intake valve 26 having a beveled face to snugly engage the beveled face of the seat. The valve 26 is provided with a depending axial shank or stem 27 extending into the valve socket and thisvshank is, as particularly shown in Fig. 5 of the drawings, formed with a circumferentially spaced series of radial vanes or flanges 28 snugly engaging with the wall of the socket for thus centering the valye with respect to the valve seat 25. Furthermore, by this arrangement the valve will be rigidly supported by the walls of the socket to reciprocate upon the pump base 12 while at the same time the valve will be entirely free with respect to the base. Removably fitted within the flange 17 of the base to rest upon the shoulder 16 is an annular guard plate 29 for the intake valve. This guard plate thus overlies the valve chamber 15 in spaced relation above the valve and is, as particularly shown in Fig. 4 of the drawings, provided with an annular series of spaced openings 30 conmiunicating with the said chamber. Threaded into the fl'L nge 17 to engage the guard plate is a pump cylinder 31 adjustable to tightly clamp the guard plate against the shoulder 16. Thus it will be seen that the guard plate is adapted to prevent accidental displacement of the intake valve 26 and will limit the valve in its upward movement within the valve chamber 15 away from the valve seat. Opening through the upper end of the intake valve is an axial recess 32 and removably fitting within this recess is a helical spring 33 bearing between the valve and the guard plate for constantly urging the valve to closed position.

The pump cylinder 31 may be of any approved length and mounted to reciprocate within the said cylinder is a suitable piston 34 carried by the lower end of a piston rod 35. The piston rod is slidably received through a closure plug at the upper end of the cylinder. This closure plug is, as par ticularly shown in Fig. 1, formed of mating sections or disks 36 and 37 respectively. `The i disk 36 is fitted into the upper end of the cylinder and the wall of the cylinder is overturned upon the said disk for holding the disk against outward displacement. The disk 37 overlies this overturned portion of the cylinder wall and loosely fitted through this latter disk and threaded through t-he disk 36 are screws 38 clamping the disks together and thus firmly securing the plug in position in the outer end of the cylinder. As particularly shown'in Fig. 3 of the drawings, the disks 36 and 37 are, at opposite sides of the piston rod, provided with pairs of registering openings 39 for venting the pump cylinder above the piston. At its upper end the piston rod 35 isequipped Vwith a suitable handle 40 in order that the piston vmay be readily reciprocated in the usual manner and loosely tted upon the piston rod within the pump cylinder is a helical spring 41 adapted to engage the closure plug at the upper end of the cylinder for cushioning the piston at the limit of its upward stroke.

As will now be seen, when the piston is moved upwardly, the valve 26 will be elevated against the tension of the vspring 33 and air will be drawn in through the openings 14 and into the pump cylinder. The intake valve will then close when, upon downward movement of the piston the air drawn into the cylinder will be forced out through the passage V18 and through the discharge tube 21. Thus my improved pump will operate with entire eiiic-iency andin this connection attention is directed to the fact that the piston will be limited in itsidownward stroke by engagement with the guard plate .29. Consequently, this plate will prevent con# tact of the piston rod with .the intake valve 26 and'will obviate the resultant distortion of the valve whichv would otherwise ultimately ensue. Furthermore, itis to be noted that by simply unscrewing-the pump cylinder 31, the guard plate 29 and valve 26, together with the valve spring 33, may be removed from the piunp base. Therefore, the spring may be renewed as occasion may demand while the valve and its seat may be maintained in perfectly'clean condition for effecting an airtight closure between the valve and the base of the pump.

In Fig. 6 of the `drawings I have illustra-ted a slight modification of the invention which relates more particularly to the provision of a removable valve seat for the intake valve of the pump. In this figure the pump base is indicated at 42. This pump base is similar to the base of the preferred 'construction `and is formed centrally with an axial valve socket 43 corresponding to the socket 13 of the preferred construction.l Pressed into this socket and removably fit-ted therein is a sleeve 44 formed at its upper end to provide a ybeveled valve seat 45 corresponding to the valve seat 25 previously described.

lThus it will be seen that the sleeve 44 is adapted to receive the intake valveV of the pump to coperate with the valve seat 45. This construction provides `an arrangement whereby the base of the pump 'may be formed of cast iron whilevthe sleeve 44 may be constructed of brass or other nonscorrosive metal to provide a durable lseat for the valve. Otherwise, the modification is con'- structed in accordance with the preferred form of the invention.

Having thus described the invention, what is claimed as new is:

l. A pneumatic tire pump including a pump base recessed to provide a valve chamber and provided with a valve socket opening into the said chamber, a valve seat formed at the juncture of the socket with the chamber, the base being provided with an intake passage opening through a wall of said socket and with a discharge passage leading from the valve chamber, an intake valve including a stem slidably fitted in said socket, and a valve disk carried by the stem for movement within the valve chamber to cooperate with the said seat for controlling communication between the said passages, a guard plate for the valve overlying the valve chamber above the valve, a pump cylinder connected to the base, and a piston mounted to reciprocate within the said cylinder.

2. A pneumatic tire pump including a base, a pump cylinder connected thereto, a piston mounted to reciprocate within the said cylinder and including a piston rod, and a closure plug for the upper end of the cylinder slidably receiving the said rod therethrough, said plug including an inner section iitting within the cylinder and having the cylinder wall overturned thereagainst, an outer section overlying said overturned portion of the cylinder wall and spaced means extending between and connecting the sections, said means being adjustable to clamp said overturned portion between the sections for rigidly securing the plug upon the cylinder.

3. A pneumatic pump including a base recessed to provide ste ped ledges having a valve chamber there etween and a valve socket opening through the lowermost ledge and communicating with said chamber, a valve provided upon the lowermost ledge at the junction of the valve socket with the valve chamber, the base being provided with intake and discharge passages, a valve including a stem slidable in said socket, and a valve disk carried by the stem for movement within the valve chamber to coperate with the valve seat for controlling communication between said passages, a guard plate for the valve rested upon the uppermost of said ledges, a pump cylinder connected to the base to communicateV with the valve chamber, and a piston mounted to reciprocate within said cylinder.

4. A pneumatic pump including a base formed with axially alined communicating recesses gradually increasing in area from Copies of this patent may be obtained for five cents each, by addressing the the lowermost recess to the uppermost recess, the lowermost recess providing a valve socket, the intermediate recess a valve chamber, and the uppermost recess a guard plate chamber, a valve seat at the junction of the valve socket and valve chamber, the base being provided with intake and discharge passages, a valve including a stem slidably fitting in said socket, and a valve disk carried by the stem for movement within the valve chamber to cooperate with said seat for controlling communication between said passages, a guard plate lying within the guard plate chamber over the valve, a pump cylinder connected with the base, and a piston mounted to reciprocate in said cylinder.

5. A pneumatic pump including a base recessed to provide a valve socket and vertically spaced ledges deining a valve chamber therebetween above the socket and communicating therewith, the base being provided with an intake passage opening into the socket and with a discharge passage leading directly from the valve chamber between said ledges, a valve seat formed at the junction of the lowermost ledge with the valve socket, a valve including a stem slidably mounted within the socket, and a valve disk carried by the stem for movement within the valve chamber to coperate with said seat for controlling communication between said passages, a guard plate overlying the valve and seating flat throughout its peripheral margin upon the uppermost of said ledges, a pump cylinder connected with the base, and a piston mounted to reciprocate within said cylinder.

6. A pneumatic pump including a base recessed to provide a valve chamber, and a valve socket communicating with the chamber, there being intake and discharge passages leading to and from the chamber, a valve seat, a valve including a stem slidable within said socket, and a valve disk carried by the stem for movement within the valve chamber to cooperate with said seat for controlling communication between said passages, the valve stem being provided with a recess opening through the valve disk, a guard plate overlying the valve, yieldable means seated in said recess of the valve and bearing between the valve and said plate for normally holding the valve closed, a pump cylinder connected with the base, and a piston mounted to reciprocate within said cylinder. j

In testimony whereof I aiiX my signature.

JESSE T. FIESE. [n s] Commissioner of Patents,

Washington, D. C. 

